Patents by Inventor Louis Beryl Kratchman

Louis Beryl Kratchman has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Electrostatic motor
    Patent number: 11863086
    Abstract: An electrostatic motor includes a cylindrical rotor and a stator. Electrodes are disposed on an inside cylindrical surface of the stator. Electrets and/or electrically conductive electrodes are disposed on the cylindrical rotor and a dielectric fluid fills space between the rotor and the stator to prevent discharge of the electrets. A mask is used to charge portions of an electret cylinder or other curved surface.
    Type: Grant
    Filed: February 26, 2021
    Date of Patent: January 2, 2024
    Assignee: The Charles Stark Draper Laboratory, Inc.
    Inventors: Louis Beryl Kratchman, James A. Bickford
  • Electrostatic Motor
    Publication number: 20210184599
    Abstract: An electrostatic motor includes a cylindrical rotor and a stator. Electrodes are disposed on an inside cylindrical surface of the stator. Electrets and/or electrically conductive electrodes are disposed on the cylindrical rotor and a dielectric fluid fills space between the rotor and the stator to prevent discharge of the electrets. A mask is used to charge portions of an electret cylinder or other curved surface.
    Type: Application
    Filed: February 26, 2021
    Publication date: June 17, 2021
    Inventors: Louis Beryl Kratchman, James A. Bickford
  • Electrostatic motor
    Patent number: 10958191
    Abstract: An electrostatic motor includes a cylindrical rotor and a stator. Electrodes are disposed on an inside cylindrical surface of the stator. Electrets and/or electrically conductive electrodes are disposed on the cylindrical rotor and a dielectric fluid fills space between the rotor and the stator to prevent discharge of the electrets. A mask is used to charge portions of an electret cylinder or other curved surface.
    Type: Grant
    Filed: February 15, 2019
    Date of Patent: March 23, 2021
    Assignee: The Charles Stark Draper Laboratory, Inc.
    Inventors: Louis Beryl Kratchman, James A. Bickford
  • Electrostatic Motor
    Publication number: 20190253000
    Abstract: An electrostatic motor includes a cylindrical rotor and a stator. Electrodes are disposed on an inside cylindrical surface of the stator. Electrets and/or electrically conductive electrodes are disposed on the cylindrical rotor and a dielectric fluid fills space between the rotor and the stator to prevent discharge of the electrets. A mask is used to charge portions of an electret cylinder or other curved surface.
    Type: Application
    Filed: February 15, 2019
    Publication date: August 15, 2019
    Inventors: Louis Beryl Kratchman, James A. Bickford